"Now these agreements are put into question by the US. It is their political choice. This reflects heightened 'warmongering' in Washington and among those willing to continue inflicting damage to bilateral relations with Russia," he said.
On Wednesday, US Secretary of State John Kerry told Russian Foreign Minister Sergey Lavrov that the US is prepared to suspend bilateral engagement with Russia in Syria unless Moscow takes immediate steps to end Syrian operations in the city of Aleppo and reinstate a ceasefire, according to the State Department.
"This is in line with imposing unilateral approaches that has never been acceptable to us," he maintained. "There can be no concern here about the situation in Aleppo, about the humanitarian problems of the population and the tragedies that happen there every day… All this is pure politics and geopolitics."
Fighting in Aleppo intensified last week after the Syrian army declared an end to the week-long US-Russian brokered ceasefire, blaming militants for numerous violations that made the cessation of hostilities unfeasible.